# Atavistik Bio funding: rounds and investors

> Atavistik Bio has raised $80M across 2 rounds since 2023. Investors include Lux Capital and RA Capital Management. Every round with its source.

Source: https://millionrounds.com/company/atavistik-bio (Millionrounds; every figure on the page links to its filing or article)

United States · [Series B startup](https://millionrounds.com/companies)

# Who invested in *Atavistik Bio*

2 rounds we have observed, with the 2 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

Biotech

Raised 8 months ago

Funding summary Updated 26 Oct 2026

**$80M** raised across 2 rounds since 2023, from 2 sources

**$40M** Venture **$40M** Series B

- **Latest round:** Series B, $40M Mar 2026
- **Investors:** 2

See who backed them

## The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

2024 2025 2026

**$40M** Venture

**$40M** Series B

- **First round:** Venture, $40M
- **Biggest round:** $40M
- **Between rounds:** 2.3 years

## The rounds

- **Mar 2026** Series B **$40M** *1 new* *1 returning* [Lux Capital](https://millionrounds.com/fund/lux-capital) [RA Capital Management](https://millionrounds.com/fund/ra-capital-management) Source recorded
- **Dec 2023** Venture **$40M** *1 new* [Lux Capital](https://millionrounds.com/fund/lux-capital) Source recorded

## Founders and team

From Atavistik Bio's own website: 1 founder, 7 on the team.

**Avenzo Therapeutics** Founder

- **Bryan E. Stuart** Chief Executive Officer
- **Nazareth Martinez Shedden** Vice President, Finance
- **Lindsay Duhaime** Team
- **Lori Steelman** Team
- **Nextech Invest** Team
- **Patrick Mcnamara** Team
- **Regulatory Affairs** Team

Advisers *Habib Dable*

## Who was in which round

The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.

**Venture** 2023 **Series B** 2026 [Lux Capital](https://millionrounds.com/fund/lux-capital) [RA Capital Management](https://millionrounds.com/fund/ra-capital-management)

## Everyone who backed them

[Lux Capital](https://millionrounds.com/fund/lux-capital) VC firm **2** rounds

[RA Capital Management](https://millionrounds.com/fund/ra-capital-management) Private equity **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=atavistik-bio).

## Also claim to have backed them

This firm lists Atavistik Bio as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.

[Nextech Invest](https://millionrounds.com/fund/nextech-invest) Private equity Per its own site

## Quick answers about Atavistik Bio

### Who invested in Atavistik Bio?

Atavistik Bio's investors include Lux Capital and RA Capital Management.

### How much has Atavistik Bio raised?

Atavistik Bio has raised $80M across 2 rounds since 2023.

### When did Atavistik Bio last raise?

Atavistik Bio's most recent round was a Series B of $40M in Mar 2026.

### What was Atavistik Bio's biggest round?

Its most recent round, $40M in Mar 2026, is also its largest on record.

### Who backed Atavistik Bio first?

Atavistik Bio's first round on record, in Dec 2023, was backed by Lux Capital.

### What stage is Atavistik Bio at?

Atavistik Bio's latest named round is a Series B, in Mar 2026.

### Where is Atavistik Bio based?

Atavistik Bio is based in the United States.

## Companies like Atavistik Bio

In the same sector, and raised in the last eighteen months.

[**Star Therapeutics** $325M · Oct 2026](https://millionrounds.com/company/star-therapeutics)[**Promaxo** $106M · Oct 2026](https://millionrounds.com/company/promaxo)[**Prolific Machines** $105M · Oct 2026](https://millionrounds.com/company/prolific-machines)[**IMIO** $19M · Oct 2026](https://millionrounds.com/company/imio)[**Clinical Ink** $24M · Oct 2026](https://millionrounds.com/company/clinical-ink)[**Rejuvenate Bio** $13M · Oct 2026](https://millionrounds.com/company/rejuvenate-bio)

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